package com.example.lilong;

import android.app.Activity;
import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;


public class DataActivity extends AppCompatActivity {
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //实例化控件
        setContentView(R.layout.main3);
        //初始化数据
    }
}